1996 4.0 Stalls
#21
Thanks for the replies. I think I'm going to remove the throttle body and soak the TPS in solvent as someone on this forum had previously suggested. I'll also replace the CPS as I have never done that before. I will also check it with the OBD2. If I find the solution I'll let you know.
the TPS breaks down because oil drips down there due to oil breathing down and never being cleaned at oil change intervals, as the filter is changed from below and the intake is never pulled apart for proper cleaning. This should be done at least once a year, maybe once every couple of years if your XJS is a garage queen like mine. It would probably avoid a lot of gunked up throttle bodies and ruined TPS...but again, at this point these ancillary parts have served us for 25 or 26 years. They are not eternal
#22
#23
#24
There is nothing cleanable on the TPS.
there is nothing to service.
if your TPS needs to be reset, it is possible to adjust it by hand, but I can’t see how that possible with a turbocharger.
You can clean the throttle body, ensuring the butterfly doesn’t get stuck, and that does indeed need to be done occasionally, but there’s nothing to service or clean on the TPS.
there is nothing to service.
if your TPS needs to be reset, it is possible to adjust it by hand, but I can’t see how that possible with a turbocharger.
You can clean the throttle body, ensuring the butterfly doesn’t get stuck, and that does indeed need to be done occasionally, but there’s nothing to service or clean on the TPS.
#25
#26
I don’t recall making such a recommendation, but if I did, it must have been because I had inhaled said solvents. The advise we are giving you here is the most sound that we know of at this time. Please kindly read thru the posts in this thread.
Good Luck
#27
#28
#29
#30
Please make sure you are looking at the LTFT, and not the STFT. The LTFT should not change as you drive. The STFT should be constantly switching. If they're not, then something is wrong.
I'm still recommending that you swap out the coils, especially if they're originals, moreso if you're looking to avoid monkeying with the TPS.
I'm still recommending that you swap out the coils, especially if they're originals, moreso if you're looking to avoid monkeying with the TPS.
Last edited by Vee; 06-02-2021 at 08:55 AM.
#31
#32
#33
Just a quick follow up, a new cps seems to have solved my stalling problems. My first replacement cps was defective and I had to order and install a second new one. An old mechanic friend of mine said you should always check your work as you go to make sure you haven't installed defective parts or screwed up the installation. Good advice then and good advice now.
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OldCoastie (07-30-2021),
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#34
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